Abstract
Abstract In the late 1960's an electronic hailstone momentum sensor was designed and built at the Institute of Atmospheric Sciences as an outgrowth of Project Hailswath (McNeil et al., 1969). The primary purpose of the development effort was to permit the measurement of hailstone impact momenta and time between hits so that hailstone size distributions and equivalent radar reflectivity factors could then be calculated (Dennis et al., 1971). A second purpose was to ease the burden of data reduction associated with hail measurement techniques such as the familiar hailpads. The design of the instrument was subsequently modified to make it a self‐contained device that could be deployed more easily. Data from hailstorms in South Dakota were gathered during the summers of 1969, 1975, and 1977 as part of various research projects. It has been shown that data gathered by the momentum sensor correlate well with both radar and visual observations of hailfall at the site. Independent evaluations (e .g. Towery and Ch...
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